|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||Exploration of Thin-walled Magnesium Alloy Tube Extrusion for Improved Crash Performance
||Bruce W Williams, Robert Klein, Jonathan McKinley, Sean Agnew
|On-Site Speaker (Planned)
Mg alloy tubes offer an attractive combination of strength and density. However, their poor crushing behavior under axial loads has prevented their use in crash-sensitive automotive structures such as crush rails. A combination of alloy selection, strain path design, and texture control were employed in an attempt to enhance the mechanical behavior of extruded Mg tubes. C-channel extrusion, porthole die extrusion, and seamless tube extrusion over a mandrel were all explored. Mandrel extrusion was confirmed to produce tubes ideal for subsequent axial crush tests, as there was no weld or extrusion seam to act as a source of weakness. Crush testing of the tubes revealed that conventional alloy, AZ31B, exhibited premature fracture prior to folding. Novel alloy, ZEK100, exhibits slightly higher ductility than AZ31B, but still exhibits poor folding behavior. The crystallographic texture of the tubes and fracture surface analyses will be discussed along with remaining strategies to enhance the crush behavior of Mg alloy tubes.
||Planned: A combination print-CD volume